Accounting machine



y 1, 1941- F. M. CARROLL ET p11. 2,247,906

ACCOUNTING MACHINE Filed Nov. 6, 1957 I5 Sheets-Sheet 1 @QTORS ATTORNEYy 1941- F. M. CARROLL ETAL .2 .90

ACCOUNTING MACHINE Filed Nov. 6, 1957 15 Sheets-Sheet 2 2 A TTORNEY y 1,1941- F. M. CARROLL ET AL 7.9 6

ACCOUNTING MACHINE Filed Nov. 6, 1957 15 Sheeis-Sheet 5 I F|G.2 A.

' ATTORNEY July 1, 1941- F. M. CARROLL ET AL 2,247,906

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F. M. CARROLL ET AL ACCOUNTING MACHINE Filed NOV. 6, 1957 15Sheets-Sheet l1 FIGJSA.

ATTORNEY July 1, 1941. F. M. CARROLL ET AL ACCOUNTING MACHINE l5Sheets-Sheet 12 Filed NOV. 6, 1937 F IGJSC.

f INENT RS fmm ATTORNEY ufiy 19 94 F. M. CARROLL ET AL 47 906 ACCOUNTINGMACHINE INEN TORS ATTORNEY July 1, 1941.

F. M. CARROLL ETAL.

ACCOUNTING MACHINE Filed NOV. 6, 1937 15 Sheets-Sheet l5 4A,. ATTO R NEY Patented July 1, 1941 ACCOUNTING MACHINE Fred M. Carroll, Binghamton,and Carl Anderson, Endicott, N. Y., assignors to International BusinessMachines Corporation, New N. Y., a corporation of New York York,

Application November 6, 1937, Serial No. 173,106

3 Claims.

This invention relates generally to improvements in accounting machinesfor adding and subtracting amounts and printing items and totals, andmore specifically it concerns a record card controlled machine whichsenses the credit or debit nature of the transaction represented by eachcard and thereby .controls the selective addition or subtraction of theamounts represented by perforations in the cards.

A set of cards is placed in the hopper at the front of the machine andpicked ofi one by one and fed into the machine. The cards serve asdirect actuators for a differential mechanism which adjusts a set oftype bars and operates a group of accumulating wheels. The date, classof transaction, and amount represented by each card are printed on eachcycle and then later, after all cards of the group have been sensed, themachine automatically stops and requires a total taking cycle. The totalprinted is a. balance resulting from the subtraction of a series ofdebit items from another related series of credit items.

An object of the invention is the provision of an improved form ofdriving mechanism wherein clutching devices are not only controlled bystart and stop keys, but there is also a direct mechanical connection tocard sensing devices for disconnecting the main operating shaft from thedriver when a total card appears or when the record card supply isexhausted.

Another object of the invention is the provision of means foreliminatingdate printing when printing a total. The dates represented oneach of the item cards are printed along therewith, but when a total isselected, the date printing type bars are not struck because shoulderson a striking plate that usually cooperates with the bars are withheldfrom association therewith.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, the principle of the invention andthe best mode, which has been contemplated, of applying that principle.

The invention is illustrated by a set of drawings which accompany andform part of the specification.

In the drawings:

Fig. 1 is a perspective view of the machine.

Fig. 2 is a sectional elevation of the center of the machine.

Fig. 2A is a plan view of the card sensing fingers and differential bellcranks.

Fig. 3 is a side elevation view showing the mechanism on the left sideframe of the machine.

Fig. 3A is a side elevation of the all-add control mechanism.

Fig. 4 is a detail view of the printer operating cam.

Fig. 5 is a detail view of the type bar alining control cam.

Fig. 6 is a side elevation of the machine showing the right side.

Fig, 6A is a detail view showing the operating rack engaging controlcam.

Fig. 6B is a detailed perspective viewof the rack disengagement controlcam.

Fig. 7 is a plan view of the main driving mechanism and main operatingshaft of the machine.

Fig. 8 is a front elevation view showing the parts at the center of themachine.

Fig. 9 is a side view of the clutching devices.

Fig. 9A is aside view of the automatic total restart and stop devices.

Fig. 10 is a plan view partly in section showing the printing devices.

Fig. 11 is a detail view of the zero eliminating striking plate.

. Fig. 12 is a detail view of the date eliminating striking plate.

Fig. 13 is a detail view of the fixed date classification strikingplate.

Fig. 14 shows an example of a record card.

Fig. 15 is a side view of the card feeding and differential controlmechanisms.

Fig. 15A is a view partly in section,' showing the card hopper, cardthroat, card picking mechanism, and stacker.

Fig. 153 is a side elevation view of the adjustable throat openingmechanism.

Fig. is a plan 'view of the cardgrippers and card supporting plate.

Fig. 15D is a plan view of one pair of card gripping jaws.

and

Fig. 16 is a front elevation view of the accumulating mechanism.

Fig. 17 is a sectional elevation view of the transferring mechanism.

Fig. 18' is a plan view showing the ribbon feed devices, the platen, andthe carriage.

Fig. 19 is a side elevation view of the line spacing devices.

Fig. 20 is a timing chart of the cams controlling the operation of themachine.

In Fig. 14 there is shown an example of the perforated card 25 which isused to control the machine to make an auditing record. This card date,a transaction andv an amount.

bracket 34.

is of the kind punched by thecounter machine set forth in copendingapplication, Serial No. 37,443, filed August 23, 1935. Each cardcontains three sets of perforations representing a The perforations arelocated differential distances from the bottom edge of the card in thewell known Hollerith system. The card shown in Fig. 14 represents a cashsale of $27.53 made on June 23.

The transaction perforation positions are divided into two groups, anupper credit group includingCash sale, Charge sale, C. O. D. sale and C.O. D. collection perforation positions; and a lower debit groupcomprising Merchandise returned for cash, Merchandise returned onaccount and Cash on account positions. The accumulating devices of themachine are con-. trolled by these transaction perforations to add theamounts accompanied by a transaction perforation in one of the upperpositions and subtract all amounts identified by a transaction mark inany of the three lower debit positions.

The machine of the present invention is adapted to sense a stack ofcards such as card 25, one

by one, and print a record of the data found thereon; and selectivelyadd and subtract the amounts and print a total or balance figure.

A total card 24 (Fig. 14) is shaped the same as the item cards 25 exceptthat the upper corners are cut off and the card is free of dataperforations. The presence of a total card is sensed by a finger whichnormally rests on a corner ofan item card when it-extends out of thehopper, but when the total card is extended, this finger is unsupportedand it then drops to effect a lockup of the machine as explained morefully hereinafter.

A pair of main side frames 26 and 21 are fastened to a base casting 28as supports for most of the mechanism. A case 28 covers all themechanism except the card' hopper and discharge stack, the platen, therecord sheet, and the total, start, stop and all-add control keys.

The clutch and driving connections The machine is operated by a motor M(Fig. '1)

which drives a main operating shaft through a gear reduction and clutchunit shown in Fig. 9 and atthe left in Figs. 7 and 8. Fastened to theshaft of motor M is a pinion 3| which meshes with an idler gear 32loosely pivoted on a screw stud 3 3 fastened to a clutch bracket 34fixed to the outside of the left side frame 21. Fixed to gear 32 is abevel pinion 35 meshing with a bevel gear 36 attached to a plain pinion21, both of the latter turning freely on a pivot 38 which protrudesinwardly from the outer wall of bracket 34. Pinion 31 meshes with aclutch driving gear 39 loosely pivoted on shaft 30. Attached to gear 39through a spiral shock absorbing spring 40 (Fig. 9) is a clutch driver4| with a pair of notches 42 for receiving the end of a clutch pawl 43pivoted at 44 on a clutch disc 45 fastened to shaft 30. A pin 48 extendsfrom gear 39 into a 90 slot in driver 4| to start the main shaft in apositive manner if the spring 40 fails to overcome the initial load. I

A coil spring 46 drawn between pawl'43 and a stud in disc 45 tends toengage the two, but normally the pawl is held outof engagement by aclutch stop lever 41 pivoted at on a web of A shoulder 52 on the lowerend of lever 41 normally abuts under the horizontal arm of pawl 43 toswing the pawl in a counterclockwise direction against a pin 83, inwhich position the end of the pawl clears the driver 4|.

, When it is desired to start the machine in operation, lever 41 isgiven a short counterclockwise movement to free the end of clutch pawl42. This is done by a link 54 having a pin and slot connection 55 to theupper end of clutch lever 41. At its upper end, link 54 is articulatedon a bell crank 58 (Fig. 3) pivoted on a stud I1 with an offset armunderlying a start key ST. The key slides in a box 58 fastened to anangle piece 58 fixed to the left side frame 21. A spring Ill holds thecrank arm up against the lower end a of key ST and raises the key sothat it extends beyond the box and an opening in the case 29. However,when the operator depresses key ST, the crank 56 is rocked clockwise,link 64 is lifted, lever 41 is rocked counterclockwise and pawl 43 isfree to engage the driver and connect shaft 30 to the motor M.

As lever 41 is rocked to start machine operation, it is latched in theoperated position (Fig. 9) by a stop latch lever 6| with a shoulder 82that engages under a lug 63 on lever 41. Stop lever BI is pivoted at 64on bracket 34 and is formed with three arms one of which is connected toa vertical link 85 by pin and slot joint 68. This link is connected atthe upper end to a bell crank 68 pivoted on the same stud 51 with crank58. However, an arm 81 of crank 66 is long enough to underlie a stop keySP mounted below key ST in box 58. A spring 69 urges lever 6| clockwiseinto latching position. When the stop key is depressed, crank 66 isrocked in a clockwise direction, link 85 is lifted, lever 8| is rockedcounterclockwise and shoulder 62 thereon is moved away from ing 63 sothat spring 64 may rock lever 41 clockwise in a position whereinshoulder 52 is in the path of the arm on pawl 43. As the pawl strikesshoulder 52 (Fig. 3) it is disengaged from the driver 4| and the mainshaft 30 comes to rest in the home position.

when the machine is'stopped manually by operation of the stop key SP asexplained hereinbefore, it is possible that the operator may stop themachine at any time. Other means are provided to automatically stop themachine after a predetermined number of cards have been sensed, or afterthe supply of cards is exhausted. These automatic devices include stopcards or total cards 24 which are inserted between different groups ofrelated amount cards 25 so that the operator need not watch the machineto determine when to stop it. For this purpose the stop latch lever 6|is provided with a vertical offset arm 10 which is operated through thestop card controls to trip lever 41 into stopping position in a mannerexplained more fully hereinafter.

As the main shaft 20 and the connections thereto are brought to a stopby the engagement of pawl 43 with shoulder 52 on lever 41, rebound- Thecard feed device The record cards 2! are placed in a hopper at the frontof the machine and fed therefrom in succession toward the'rear of themachine. After each card reaches the center of the machine its motion isreversed and it is allowed to in a counterclockwise direction, movingpicker sli into a storage stacker at the front of the machine directlyunder the feeding hopper.

The front part of the two side frames 20 and 21 is extended to form asupport for a table plate 16 (Figs. 2, 6 and 15A) upon which the cards25 rest. Fastened to plate 18 is a pair of vertical guides 11 forming ahopper opening in which the cards are placed face down to be analyzed.The bottom'edge 18 (Fig. 14) of the card is placed at the rear of thehopper to lead in entering the machine. The back plate 1915f the hopperis fastened to theside frames and formed with a rearwardly extendingoffset 80 spaced a short distance above plate to provide an openingthrough which the cards are fed-into the machine.

An adjustable throat opening is provided to insure that only one cardenters at a time. Attached to the back of plate 19 (Fig. 153) is a longvertical bracket 8I with horizontal ears in which slide the reduced endsof a throat rod 82. 'Riveted to the middle of the rod 82 is an extendingthroat member 83 with an offset pointed end 84 which protrudes throughan opening 85 (Fig. A) in the back plate 19. Riveted to the lower partof rod 82 is a bracket 86 supporting a threaded stud 81 directly underthe end 84 of the throat member. By means of the thread, stud 81 may beadjusted to provide the required throat opening under end 84 and then belocked in place by nut 88.

Another adjustable connection is provided so that the throat openingparts may be moved up or down as a whole until the desired verticalposition is reached in alignment with the bottom card in the hopper. Aspring 89 around the lower end of rod 82 tends to push the rod upward,but the rod and all parts thereon are held in the proper position bypinching an extension 90 of member 83 between a stud 9| (Figs. 15 and15A) on plate 19 and a screw 92 in the end of an offset bracket 93attached to plate 19. A look nut 94 maintains a tight connection afterthe throat is properly located.

The cards are picked off the bottom of the stack in hopper 11 one at atime and moved a short distance into the machine where they are graspedand moved further to be analyzed. A pair of picker slides 95protrudethrough openings 96 in table plate 16 and carry picker blades 91which extend far enough to engage the front edge of the bottom card.Each slide 95 is loosely pivoted between a pair of oscillating arms 98fastened to an operating shaft 99 loosely pivoted in the main sideframes. Springs I00 coiled around rods IOI between the pairs of arms,press upward against the lower part of slides 95 and keep sliding pinsI02 extending therefrom, in contact with the lower side of plate 15 asthe slides are reciprocated back and forth.

The picker slides are operated by connections driven by a cam I03 (Figs.7, 8 and 15) fastened to main shaft 30. A lever I04 pivoted on a studI05 on frame 21 carries a roller I08 in contact with cam I03. Looselyconnected to the upper end of lever I04 is the rear end of a link. I01the other end of which is articulated with an operating arm I08 fastenedto the picker shaft 99. Attached to lever I04 and a rod I I0 is a springI09 which urges roller I06 into cooperation with cam l'03 so that as thecam makes one revolution, leverI04 is rocked clockwise (Fig. 15) toblades 91 to the left to the normal position as seen in Fig. 2. e

As the picker slides 00 push a card before them into the machine aseries of gripping jaws H4, H5 (Figs. 2, 15 and 156) are opened toreceive the edge of the card. Then the jaws are closed to grip the cardand carry it back further into the machine before discharging it intoastacker.

Inside the machine the card rests on aswinging stacker plate 8 which ispivoted at the rear on a shaft 1. Attached to the plate I I8 is a camfollower lever II8 (Fig. 8) carrying a roller H9 in cooperation with acam I20 on shaft 30.

A spring I'2I (Fig. 15) attached to the top of lever II8 urges'theroller against cam I20 and tends to lower the plate IIG. However. thecam is shaped so that normally the front part of plate H6 is raised inalignment with the bottom plate 18 of the hopper so that the bottom cardmay pass over from one to the other.

The front part of'plate H6 is curved downward to guide the incoming cardover the top and into the gripper jaws. This part of the plate is alsoextended at the sides at I22 and I23 (Fig. 150) out of the path of thecards. These extensions cooperate with embossings on the lower side ofoffset so that there is maintained between plate H6 and the offset aspace through which a card may pass.

In Fig. .150 it is seen that stacker plate H6 is cut out with a seriesof slots, four wide ended slots I24 and other plain slots I25. Theposition of these slots laterally, corresponds with the lines of indexpoints on the card 25 (Fig. 14) so that as a card passes over the platethe plate doesnot interfere with the point of a sensing finger droppedthrough a perforation in the card.

The sides of the four slots I24 act as guides for four sets of cardgripping jaws H4, 5. Each lower jaw H5 is formed as part of a grippinglink I26 which is loosely pivoted at the rear on a swinging shaft I21.This shaft is suspended in the lower ends of a pair of long arms I28fastened to an operating shaft I29. Outside the left side frame (Fig. 3)an operating arm I30 is fastened to shaft I29 and depending therefrom isa link I3I pivoted at the lower end on a cam lever I32 fulcrumed on ashaft I33 between the side frames. On lever I32 is a roller I34 whichcooperates with a cam I35 designed to regulate the movement of the cardgrippers. A spring I38 tends to hold the shaft I21 (Fig. 2) forward, butearly in each cycle a rising cam face on cam I35 (Fig. 3) depresses theparts I32, I3I and I30, rocking shaft I29 in a clockwise direction andswinging arms I28 and shaft I21 to the rear as shown in Fig. 15,-carrying gripping links I28 along therewith.

Turning again to consideration of the card gripping jaws which are movedtoward the rear as explained, it is noted that the upper jaw H4 is theoffset part of a lever I31 pivoted on link I26 by a stud I38. The jawsare confined to the slot I24 because the tip of lower jaw II5 (Fig.I'5D) is of a width slightly less than the width of the slot, and topjaw H4 is extended in width beyond the edges of the slot in order tohold the jaw opening in alignment with the top of plate IIB. A springI39 between lever I31 and link [I28 normally holds the jaws H4, H5closed.

of plate II6.

The jaw moving devices include a cam I46 fixed to shaft 30. This camcooperates with a roller I on a lever I42 fulcrumed on shaft I33supported in the side frames. Pivotally connected to the end of leverI42 is the lower end' of a link I44 which at the upper end isarticulated on a jaw camming lever I45. The lever is pivoted on ashaft'l46 and formed with a pair of cam faces I41 and I48 adapted tocooperate with a roller I49 on a jaw operating lever I50 fastened toshaft I21. Also fastened to shaft I21 are a series of four shortoperating arms II each ofwhich is aligned with the rearwardly extendingtail on one of the jaw levers I31. A coil spring I52 between levers I50and I28 tends to rock shaft I21 in a clockwise direction to keep armsI5I away from jaw levers I31 so that they remain closed. However, earlyin each cycle, a rising cai'n face I53 on cam I40 acts to depress rollerI4I, lowering link I44 and rocking lever I45 in a clockwise direction sothat a cam face I41 thereon pushes roller I49 to the left, Fig. 2,rocking lever I50, shaft I21 and arms I5I counterclockwise, said armsrocking levers I31 clockwise about pivots I38 to open jaws H4, H5. Thenthe picker devices shove the edge of a card into the jaws and,immediately thereafter, a depression I54 in cam I40 permits the jawopening devices to be retracted as urged by a spring I68 pulling leverI45 counterclockwise away from roller I49 so that spring I52 may rockarms I5I away from jaw levers I31, permitting the jaws to close on thecard under the tension of springs With the card gripped in jaws I I4, II5 it is then drawn toward the rear along the top of plate II6 by theswinging movement of arms I28 and shaft I21 on which the gripping linksI26 are pivoted. At the end of this rearward movement of the card, andafter it has been completely analyzed, a depression I55 in cam I20allows lever II8 to rock plate II6 downward to the card dischargingposition. At the same time the jaw opening devices are again madeeffective by an extending surface I56 on cam I40 which presses surfaceI48 on cam lever I45 against roller I49 to rock arms I5I and levers I31and open the gripping jaws. The gripping members, link I26 and lever I31are rocked down with the, plate II6 because of the confiningconformation of jaws H4, H5 which are held by the sides of slot I24.

Near the middle of the cycle (Fig. 15) while plate II6'is tipped downtowards the front of the machine and jaws H4, H5 are opened, a pair ofstacker fingers I51 are rocked down along two of the slots I25 behindthe descending card to insure that the card is deposited in a stackerbin I58 placed under the front of the machine. These fingers I51 areattached to a shaft I59 (Fig. '7) which is pivoted in a bracket I60attached to base 28. A spring I6I (Fig. 15) drawn between a stud I62 ona crank arm of one of the fingers and a vertical extension I63 of oneside of bracket I60, tends to hold the fingers retracted towards therear of the machine. But the other finger carries a stud I64 engaged bya slot opening in the end of a cam follower arm I65 loosely pivoted onshaft I33. A roller I66 on arm I65 extension on the cam pushes down theroller I66 and arm I66 to rock fingers I61 counterclockwise so that theyshove the card before them down the inclined plate H6 and into bin I56.

Directly after the mid-point of the cycle, fingers I61 are drawn back byspring I6I as the cam face on cam I61 recedes, and plate H6 is lifted tonormal position by cam I20. Then also, roiler I H is allowed to movetoward the center of cam I56 and the connected linkage, as urged by aspring I63 attached to lever I45, allows the jaws H4, H5 to again close.Toward the end of the cycle, cam I35 (Fig, 3) allows the linkage I32,I3I, I36 shaft I29 and arms'I28 (Fig. 15) to move the jaw links I26 andlevers I31 gradually towards the left to the normal position (Fig. 2) inwhich they are adapted to receive the next card.

The card sensing diflerential mechanism As the card moves towards therear of the machine, sensing devices are brought into registra'tion withthe perforations therein, and said devices are moved directly by thecard differentially according to the location and value of theperforation. For example, a 9" perforation which is the first to besensed, since it is near the leading. edge, will move the cooperatingdifferential device through nine steps of movement, while a 1perforation, which is sensed much later, will actuate a device throughonly one step of movement.

The differential devices include a series of settable bell cranks I10(Fig. 2) pivoted on a shaft "I each carrying a sensing finger I12 heldthereon by stud I13. As seen in Fig. 2A, the

ends of fingers I12 are broadened at I14 to excooperates with a cam I61fixed to shaft 30. .An

tend beyond the sides of the slots I24 and I25 over which the fingersare normally poised. At the bottom of each finger is a Point I15 whichrests on the card 25 until a perforation appears. Then the point dropsinto the perforation and the front edge of the point is engaged by theedge of the perforation and thus, as the card continues to move towardsthe back of the machine the finger and the related bell crank I10 aredrawn a differential distance towards the rear by the card. Each cardmoves towards the back a like amount, but the distance through which thebell crank is moved is dependent on the differential location of thecontrolling perforation.

Normally all the fingers are held above the path of the card by a commonrod I16 which extends across the machine under slanted cam faces on thefront of the fingers. The rod is attached to a pair of arms I11 fixed toa shaft I18 loosely pivoted in the side frames. Pivoted on shaft I18 isa bail I19 for operating the arms I11. This ball is formed with twooffset lugs, the one lug I passes under the left arm I11 and the otherlug I8I is in the path of a pushing member I82 riveted to the pickerlink I01. When the parts are in the home position (Fig. 2) a spring I83(Fig. 15) holds up the arms I11., rod I16 and fingers I12. However, asthe card picker devices near the end of the movement induced by cam I03,member I82 strikes lug I8I and rocks bail I19 in a counterclockwisedirection. Attached to the bail is one end of a strong spring I84 theother end of which is fastened to the left arm I11. This spring I84tends to make arms I11 follow the bail I13-and move down to a positionwherein rod I16 allows the fingers I12 to descend with points I15resting on the card which is then gripped by the jaws I I4, I I5.

At this point it is well to explain that the card is moved rearwardly bytwo agencies. It is first moved a short distance by the picker devicesand then drawn through a longer distance by the grippers on the swingingarms I28. During the initial movement of the card, the sensing fingersare merely allowed 'to move down in cooperation therewith, but duringthe latter movement, the card moves the fingers and the connected bellcranks I10.differentially towards the rear.

The bell cranks I10 are guided by a slotted angle plate I85 fixedbetween the side frames. Spring I83 is attached to this plate and urgesthe arms I11 upward to stop against the bottom of plate I85 as soon asthe picker member. I82 moves towards the front of the machine. Bail I19is rocked clockwise along with arms I11 because at this time, sincemember I82 is away from lug I8I, spring I84 moves lug I80 against armI11 and the two parts move as one under the influence of spring I83.With rod I18 r fingers I12 are cammed up out of the path of the nextcard when they are swung forward in the restoring motion.

Provision is madeto prevent the fingers from swinging too far in acounterclockwise direction around center I13 when the card is lowered asof a link 205 reaching down to a connection 208 (Fig. 5) with acamfollower arm 201 loosely pivoted on shaft I33. On arm 201 is a roller208 cooperating with a cam 209 fastened to operating shaft 30, At themiddle' of each cycle, after the differential linkage and the type barsare positioned by the perforations in the card, a depres- 1 then rocksbail 202 counterclockwise (Fig. 2) to push the crossbar into the notchesin the adjusted type bars to locate and lock the differenin Fig. 15.This means takes the form of an extending foot I86 011 bell crank I10,said foot engaging under a pin I81 on the side of the con nected fingerI12.

Turning tothe plan view in Fig. 2A, it is seen that thirteen bell cranksI are provided, eleven those representing $27.53 in Fig, 14.

- Eachof the seven differential bell cranks I10 at theright of themachine (Fig. 2A) is pivotally connected by stud I13 toan accumulatorrack I88 extending horizontally (Fig. 2) toward the rear of the machinewith a series of rack'teeth I89 for operating an accumulator pinion I90.The racks are slotted at I9I'to engage a common operating rod I92 whichis lowered and raised to mesh and demesh the 'rack teeth and the pinion.

The horizontal arm of each differential bell crank I10 is pivotallyconnected through a pin and slot connection I93 to a vertically slidingtype bar I94. A slotted guide plate I95 and an L shaped aligner I98serve to'guide-the lower ends of the type bars. Both of these guideplates I95 and I96 are fixed to a pair of separate removable printerside frames I91 and I98 which are fastened to cross plates I99 and 200secured between the main side frames.

An aligning means which cooperates with the type bars not only serves'toalign the printed linkage in the proper adjusted position. Into the rearside of the lower end of type bars I94 there are cut'a series ofaligning notches I which pass before the crossbar of a bail 202 pivotedon studs 203 on the" printer side frames (Fig. 8). The left arm of theball is extended and carries a stud 204 on which there is pivoted thetop end tial mechanism in a definite manner while printing takes place.Soon after printing the cam 209 is effective to actuate the alignerlinkageand vided thereon for the top end of a link 2 I3 which at itslower end is articulated on an operating.

arm'2l4 pivoted on shaft I33. A roller 2I5 on arm 2 cooperates with acam 2I6 which-allows aspring 2" to pull ball 2 gradually in acounterclockwise direction away from the rocking differential bellcranks I10 during the first half .of the operating cycle, Then duringthe remainder of the cycle the cam 2I8 acts positively on the restoringlinkage to turn ball 2 ma clockwise direction and thereby push cranksI10 (Fig. 2)]

in the same direction to the normal position.

. impression, but also locates the entire differential The accumulatingmechanism Adding and subtracting devices areprovided to accumulate theamounts on cards relating to credit transactions such 'as Cash. vCharge,C. O. D. and C. 0. D. collections, while the other debit amounts such asmechandise returned for cash, merchandise returned on account and cashon account are subtracted.

The accumulating devices are held together as a unit within a separatelyremovable frame comprising a pair of side frames 2I9 and 220 (Figs. 2,3, 6, 16 and 17) attached to footing brackets 22I secured to the base28. Within the main outer accumulator frame is a smaller shiftable framecarrying the accumulator gearing which may be varied to get reversemotion for subtraction. The small frame is made up of a pair of sideframes 222 and 223 spaced apart by brackets 224 and 225 secured thereto.A spring 228 atached to bracket 224 .and acc'umulator side frame 220urges the sliding frame towards the left (Fig. 16) to the subtractiveposition. However, a rod 21 (Fig. 17) attached to the small frame andadapted to slide in bearings 228 and 229 in the main accumulator frames,abuts against the side of a shift cam plate 230 (Fig. 16) which normallyholds the gearing in adding position. A shaft 23I on which the addingpinions are pivoted is secured to the small frame and guides it bysliding it in an open ended slot 232 (Fig. 6) in right side frame 2I9.The sliding frame is stiffened from within by three brace rods 233, 234and 235 riveted to side plates 223 and 224. Other shafts 236, 231 and238 are removabiy held in the small frame; the ends of these shafts arenotched and

